Know all about Hawaiite and Siltstone properties here. All properties of rocks are important as they define the type of rock and its application. Hawaiite belongs to Igneous Rocks while Siltstone belongs to Sedimentary Rocks.Texture of Hawaiite is Glassy, Massive, Porphyritic, Scoriaceous, Vesicular whereas that of Siltstone is Clastic. Hawaiite appears Dull and Soft and Siltstone appears Rough. The luster of Hawaiite is not available while that of Siltstone is dull. Hawaiite is available in black, brown, light to dark grey colors whereas Siltstone is available in brown, red, reddish brown colors. The commercial uses of Hawaiite are creating artwork, sea defence and that of Siltstone are raw material for the manufacture of mortar, soil conditioner.